High-ExpansionFoam SystemsHigh-ExpansionFoam Systems

Medium-ExpansionFoam

Medium-expansion foam is an aggregation ofbubbles resulting from the mechanical expansionof a foam solution by air or other gases with afoam-to-solution volume ratio ranging from 20:1to 200:1. Medium-expansion foam can be used onsolid fuel and liquid fuel fires where some degreeof in-depth coverage is necessary or where rapidvapor suppression is required. It is effective bothindoors and outdoors and produces far morefoam using less water than low-expansion foamsystems.Popular discharge devices used to make medium-expansion foam are the Ansul KR-M mediumexpansion foam nozzles. These versatile nozzlescan be used with various types of foam agentsincluding TARGET-7™ Vapor Mitigation andNeutralizing Agent as a vapor suppressant forhazardous fuming compounds such aschlorine dioxide, oleum, chlorosulfonic and othertypes of acids. With ANSULITE® 3x3 foam, thesenozzles are also effective for flammable andcombustible hydrocarbon and polar solvent(water miscible) fuel fires. The KR-M nozzle canalso be used with JET-X foam as a fire suppressantfor hydrocarbon fuel products. Finally, thesenozzles are regularly used with SILV-EX® Class-Afoam as a high performance fire suppressant ondifficult Class-A fuel fires including wood, paper,coal and rubber. The KR-M medium expansionnozzle can be used with all of these agents as ahand line discharge device or as part of a fixedsystem (i.e., tank dike protection).

Form No. F-98207-1 2002 Ansul Incorporated Litho in U.S.A.

For more information about AnsulHigh-Expansion Foam Systems…Contact Your Authorized Ansul FoamSystems Distributor…Or Call:

1-800-TO-ANSUL (USA/CAN)

1-715-735-7411 (International)

Alternate Fire Protection for…◆ Aircraft Hangars◆ Hazardous Waste Storage◆ Flammable Liquid Storage◆ Cable Tunnels◆ LNG & Ammonia Spills◆ Coal Transfer Houses◆ Turbine Generators◆ Solvent Rooms◆ Paper Product Warehouses◆ Tire Warehouses◆ Mines◆ Engine Test Cells◆ Ship Holds & Engine Rooms◆ Transformer Rooms◆ Basements, Cellars & Enclosed Spaces◆ Communications Switching Stations

UUUU TTTT IIII

II RR

TYCO, ANSUL, ANSULITE, JET-X, TARGET-7 AND SILV-EXare trademarks of Ansul Incorporated or its affiliates.

KR-M Medium andKR-S/M Dual-ExpansionFoam Handline Nozzles

Z Model Eductors

www.ansul.com

Ansul IncorporatedOne Stanton Street

Marinette, WI54143-2542

How doesJET-X® foam work?

JET-X foam concentrate is a synthetic basedformulation comprised of hydrocarbonsurfactants, solvents, and stabilizers.Effective on Class-B flammable andcombustible liquids as well as Class-Aordinary combustibles, JET-X high-expansionfoam extinguishes fire using severalmechanisms.

▲ Cooling – Water carried to the firedrains out of the expanded foam cooling thefire, the hazard, and the immediatesurroundings.

▲Smothering – The air supplying the firesource is cut off or reduced enough to inhibitcontinued combustion.

▲Penetrating – Because of its low surfacetension, solution draining from the foampenetrates Class-A materials and controlsdeep-seated fires.

▲ Insulating – At a sufficient depth, foamprovides an insulating barrier aroundexposed materials or structures to controlthe spread of fire.

The ever increasing number of fires occurring inwarehouses, storage buildings, conveyors,aircraft hangars, tunnels, etc. suggests thatthe risk of fire in these structures is greater thanever before. In addition, the risks are no longerjust Class A or B materials; they are hazardoustoxic chemicals.

Many facilities need high-expansion foam protection.

Systems you can depend onAnsul high-expansion foam systems are ULlisted and meet the requirements of NFPA11A. Ansul supplies the complete packageincluding JET-X® foam concentrate,bladder tank, proportioner, and foamgenerator(s) – all of which operate on waterpressure – no electrical power source isrequired.Upon operation, incoming water pressurizesthe bladder tank, forcing concentrate fromthe bladder into the proportioner at thesame pressure as the water. The proportionermixes the water and concentrate to a 2.75%solution enroute to the generator(s). The foamsolution is expanded and discharged throughreliable water-powered foam generatorswith outlet capacities ranging fromapproximately 1,000 to 20,000 cfm(28 to 566 m3/min).

The Ansul solution

NOTE: This drawing represents a typical high-expansion foamsystem protecting a rack-storage area. Specific system designrequires an in-depth hazard survey and subsequent engineering.For clarity, the detection system is not shown.

High-Expansion Foam Generator

VerticalFoamBladderTank

FoamGenerator

FoamGenerator

JET-X® Foam Concentrate

Horizontal StyleBladder Tank/Proportioning System

Proportioner

Water Supply

A long-proven fire protection method, Ansulhigh-expansion foam systems automatically seekout and suppress fire at the source using muchless water than a stand-alone water sprinklersystem. With expansion ratios typically greaterthan 500:1, high-expansion foam is suitable fornumerous applications includingthree-dimensional hazards, confined spaces andvapor suppression. As such, high-expansionfoam is measured by volume output rather thanapplication rate as is typical of low expansionfoams. Due to these differences, a separatestandard exists for high-expansion foam systemsentitled NFPA 11A: Medium and High ExpansionFoam Systems. NFPA 11A catagorizes three typesof systems: 1) Total Flooding - systems designedto quickly fill an enclosed space above thehighest hazard; 2) Local Application - where thefoam is discharged directly onto the fire orspill - aircraft hangars (NFPA 409) or LNG; and3) Portable Foam Generating Devices - mainly forconfined, underground applications.

Ansul high-expansion foam systems offer manyadvantages over conventional water or foamsystems including:◆ Low water consumption and minimal

water damage◆ Effective on both polar solvent and

hydrocarbon flammable liquids◆ Controls three-dimensional fires◆ Excellent foam mobility & stability◆ Reduces the need for containment and/or

fire pumps◆ Low foam concentrate consumption◆ Cost effective and expedient installation◆ Minimized maintenance◆ Environment-friendly